The researchers found that incidence rates over this 30 year-period were stable, decreased, or continued a gradual increase that started before the introduction of cell phones.
研究人员发现，在这三十年中，脑瘤发病率保持稳定、减少，或在推出手机之前，就继续递增。
The consumer price of the residents nationwide dropped by 0.7 percent from last year's same period, showing a trend of slight increase while remaining stable.
一季度全国居民消费价格总水平同比上涨0.7%，呈现出平稳并略有上涨的势头。
Calcitonin levels remained stable and did not increase during the 2-year period in a subset of 146 randomized patients.
在两年的试验期间一群146名随机受试者的降钙素水平保持稳定。
Applying in FCC gasoline can increase the guiding period, and solved the problem that gasoline oxidizing stable property when it was kept long period.
BHT是一种优良的抗氧剂，应用于催化裂化汽油中能提高汽油诱导期，有效地解决汽油长期贮存氧化安定性变差的问题。
Applying in FCC gasoline can increase the guiding period, and solved the problem that gasoline oxidizing stable property when it was kept long period.
BHT是一种优良的抗氧剂，应用于催化裂化汽油中能提高汽油诱导期，有效地解决汽油长期贮存氧化安定性变差的问题。
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